Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Ontario → Dallas via Atlanta: arrives on time 75%

11:50 ONT → 19:11 ATL

DL 665 · Delta · 4h 21m · 85% on time, 1.6% cancelled
2h 04m layover in Atlanta (ATL) · 45 min minimum on one ticket
21:15 ATL → 22:34 DAL

DL 1104 · Delta · 2h 19m · 82% on time, 2.5% cancelled

Total trip 8h 44m, scheduled departure to arrival (Dallas is 2 h ahead of Ontario). Times are local. Both flew on 56 of the last 56 days.

Makes the connection95%The first flight arrived more than 79 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 2h 04m layover.

Arrives on time75%First flight not cancelled (1.6% are) × connection made (95%) × second flight not cancelled (2.5% are) and within 15 minutes (82%).

Total trip8h 44mONT 11:50 to DAL 22:34, layover included

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.